Certain mechanics needed major fixes. This was not one of them. A 40% drop in damage on swarm pets was a bit of an overreaction, in my opinion. Yes, they did need to be rebalanced a bit. Fervor did apply weirdly to them, same with Victorious Concerto and Temporal Mimicry. But dropping the bonus they get from Potency and CB is a huge deal. It doesn't neuter the class completely. But it still puts a major dent in the viability of summoners. I am not happy with this in the slightest.